Finding the Fourth Proportional to 938.69, 1,406.06 and 608.82

Step by Step Solution

1. Step 1: Write the proportion equation
   938.69 : 1,406.06 = 608.82 : x
2. Step 2: Convert to fraction form
   938.69/1,406.06 = 608.82/x
3. Step 3: Cross multiply
   938.69x = 1,406.06 × 608.82
4. Step 4: Simplify right side
   938.69x = 856,031.42
5. Step 5: Solve for x
   x = 856,031.42/938.69
6. Step 6: Final answer
   x = 911.94